Wi-Fi answers
BT — slow in the evening
BT: why does my broadband slow down in the evening?
The short answer
Evening slowdowns split two ways. If a wired speed test is also slow between 7pm and 11pm and fine at 10am, that pattern belongs to your provider. If the wired test stays fast and only Wi-Fi devices suffer, the house is busy and the Wi-Fi is the bottleneck.
Do it wired, twice, and save both results.
| Item | What we have on record |
|---|---|
| Wi-Fi support tier | Supported Wi-Fi |
| WiFiXpert Experience Score | 66/100 |
| Their own Wi-Fi app | Yes |
| Official help page | https://www.bt.com/help/broadband/fix-a-problem/broadband-and-wi-fi |
| Service status page | https://www.bt.com/help |
The short answer
- Evening slowdowns split two ways. If a wired speed test is also slow between 7pm and 11pm and fine at 10am, that pattern belongs to your provider. If the wired test stays fast and only Wi-Fi devices suffer, the house is busy and the Wi-Fi is the bottleneck.
Is it the line or the Wi-Fi?
- Test wired next to the router
- Test in the room that struggles
- Write both numbers down with the time
Free things to try first
- Run the same test at 10am and 9pm, wired — Two numbers, same device, same cable. That is the whole argument.
- Count what is actually streaming — Four 4K streams and a games console update will fill most connections.
- Raise it with your provider with dates attached — Repeated evening slowdowns on a wired test are a network problem, not your Wi-Fi.
Where BT fits in
- BT is a "Supported Wi-Fi" provider in our comparison, scoring 66/100 for the Wi-Fi support they actually give you.
- My BT and Whole Home apps, with engineers who can look at the line and the Wi-Fi.
- Take dated evidence with you — it changes how the call goes.
If it is not fixed
- Ask for a formal complaint reference
- Six weeks unresolved, or a deadlock letter, opens the free independent route
People also ask
- Is this a BT fault or my Wi-Fi?
- How do I report this to BT?
- Will a BT engineer visit help?
- Can I use my own router with BT?
If you do end up spending money
Only after the free fixes. Nobody pays to appear here, and no shop link changes anything we say.
- Mesh or a wired second point — only after the free fixes
- Managed Wi-Fi, where the provider owns the fix instead of you